X-Git-Url: https://git.ucc.asn.au/?a=blobdiff_plain;ds=sidebyside;f=ROM2%2Fcomm.c;h=c3743476efa6ec731b46e1949296b632af6ff783;hb=91c2cae2d1a21bbff2dc3e4a7bec4f6e7baa7a2d;hp=09ad2a16c89c9015d0a309019b874718ee7f4517;hpb=2e7a8beb908896930042bc0564fbd16f3e0b0b62;p=uccvend-snackrom.git

diff --git a/ROM2/comm.c b/ROM2/comm.c
index 09ad2a1..c374347 100644
--- a/ROM2/comm.c
+++ b/ROM2/comm.c
@@ -40,7 +40,7 @@ u8 uart_init() {
 	_uart_regs[UART_INT_ENABLE] =
 		IE_RECEIVER_READY | IE_TRANSMITTER_READY | IE_LINE_STATUS_CHANGE;
 
-	/* Use the FIFO and empty them */
+	/* Enable the FIFO and empty them */
 	_uart_regs[UART_FIFO_CTL] =
 		FIFO_ENABLE | FIFO_RX_CLEAR | FIFO_TX_CLEAR | FIFO_LVL_1;
 
@@ -143,6 +143,22 @@ void uart_interrupt() {
  * End of interrupt handler
  */
 
+void send_ack() {
+	wait_for_tx_free();
+	tx_buffer[0] = '!';
+	tx_buffer[1] = '\n';
+	tx_buffer[2] = 0;
+	send_packet();
+}
+
+void send_nack() {
+	wait_for_tx_free();
+	tx_buffer[0] = '?';
+	tx_buffer[1] = '\n';
+	tx_buffer[2] = 0;
+	send_packet();
+}
+
 /* sends the packet in tx_buffer and doesn't return until it's been sent */
 void send_packet() {
 	bset((void*)&tx_queue_state, 0x01);